When elements of the United States Army set up camp at Springhill near the village of Moneymore, Co. Londonderry, the main house and outbuildings saw use by officers, while the courtyard was an area for recreation and drill.
With soldiers making use of the house and grounds, there were some changes around Springhill House during the Second World War. Mina Lowry Lenox-Coyningham provided GIs with books from the library and ice cream.
During the Second World War, the United States Army remained segregated by race. In Moneymore, black soldiers had a camp in Nissen huts set up in the Tower Hill area to the rear of the main house at Springhill.